Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...

[firefly-linux-kernel-4.4.55.git] / kernel / futex.c

diff --git a/kernel/futex.c b/kernel/futex.c
index 67dacaf93e56c0edb12b74a84b40da9fe596ea49..6801b3751a95cd0933463fc38039cb77d6ced705 100644 (file)
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1452,6 +1452,7 @@ retry:
        hb2 = hash_futex(&key2);
 
 retry_private:
+       hb_waiters_inc(hb2);
        double_lock_hb(hb1, hb2);
 
        if (likely(cmpval != NULL)) {
@@ -1461,6 +1462,7 @@ retry_private:
 
                if (unlikely(ret)) {
                        double_unlock_hb(hb1, hb2);
+                       hb_waiters_dec(hb2);
 
                        ret = get_user(curval, uaddr1);
                        if (ret)
@@ -1510,6 +1512,7 @@ retry_private:
                        break;
                case -EFAULT:
                        double_unlock_hb(hb1, hb2);
+                       hb_waiters_dec(hb2);
                        put_futex_key(&key2);
                        put_futex_key(&key1);
                        ret = fault_in_user_writeable(uaddr2);
@@ -1519,6 +1522,7 @@ retry_private:
                case -EAGAIN:
                        /* The owner was exiting, try again. */
                        double_unlock_hb(hb1, hb2);
+                       hb_waiters_dec(hb2);
                        put_futex_key(&key2);
                        put_futex_key(&key1);
                        cond_resched();
@@ -1594,6 +1598,7 @@ retry_private:
 
 out_unlock:
        double_unlock_hb(hb1, hb2);
+       hb_waiters_dec(hb2);
 
        /*
         * drop_futex_key_refs() must be called outside the spinlocks. During